A covert mission refers to a secret or hidden operation carried out by a group or individual. It involves performing tasks or gathering information without publicly revealing one's identity or objectives. Full definition
Developing reconnaissance and surveillance - camera technology to track Russia's military strength was a deeply covert mission in itself. (newscientist.com)
As a global organization, The Black Watchmen offer a wide range of skills and services for covert missions anywhere in the world, on behalf of any group, corporation or government that can afford them. (elearningindustry.com)
With Sonic banished to an unknown realm, it's up to the remaining team to take on a series of covert missions across the globe to gain control back from Eggman and his army. (egmnow.com)